Bran duster



A. WOLF BRAN DUSTER Feb. 23 1926. 1,574,722

Filed March 15 1924 2 Sheets-Sheet 1 patented Feb. 23,1926.

' ed a relatively largebearing 1,1 for arotary- UNITED STATES AUGUSTUSWOLF, OF CHAMBERSBURG, PENNSYLVANIA.

BEAN DUSTER.

Application filed March 13, 1924. Serial No. 698,945.

To all whom it may concern: Be it known that I, AUGUSTUS vVo'nr,acitizen of the United States, residing in Chamliersburg, Pennsylvania,have invented a Bran Duster, of which the following is a specification.

One object of my invention is to provide a machine particularly designedto bolt out the heavier particles from grain which has been suitablycrushed in a mill with a view to separating such particles whichconstitute the flour from the light fibrous elements.

Another object of my invention is to pro- These objects and otheradvantageous ends I attain as hereinafter set forth reference belng hadto the accompanaying drawings,-111wh1ch,

Fig. 1 15am end elevation-of a bran duster constructed in accordancewith my inven-' tion,

Fig. 2 is alongitudinal vertical section on the line 2-2, Fig. 1;

Fig. 3 is a transverse vertical section on the line 33, Fig. 2;

Fig. 4 is an enlarged View illustrating the action of the brsuhes;-and,

Fig. 5 is a sectional perspective view of one of the ribs of the reel..

In the above drawings, 1 represents the flat top and 2 and 3 theremovable panel sides of the body of my bran duster which includes alsotwo relatively heavy side frame members .4 and 5 and a longitudinallyextending inclined bottom 6-6 This body with said frame members issupported-on two pairs of standards or'legs 7-7 of which those of each)air are braced together by transverse mem ers 8. The body of themachine" includes also two vertically extending ends 9 and 10, in thefirst of which is mountsleeve 12, while the second end 10 likewise T hasmounted in it a bearing 13 for an elongated sleeve 14. The sleeve 12 hasmounted upon or formed integral with it a pulley or sprocket wheel 15connected by a chain or belt 18 with a second'sprocket or pulley 16fixed to a shaft 17. The latter is journaled in the bearings 19 and 19supported by the lower portions of the end members 9 and 10 and likewisehas fixed to it a second and larger sprocket or pulley 20 connected byachain or belt 21 with a sprocket ,or pulley 22. i

The frame members 4 and 5 are preferably extended beyond the end members9 and 10 of the machine and. at one end thereof are connected by a crossbeam 23 ;-'at the opposite end being likewise connected by a secondcross beam 24. As shown in Fig. 1,

these cross beams are centrally made with open octagonal portions ineach of whichis mounted an octagonal box25 serving to rotatably supporta shaft 26 which extends longitudinally through the machine from one endto the other. This shaft has fixed to it the sprocket or pulley 22preferably between one of the boxes 25 and the adjacent end member 9 ofthe machine and outside of said box has fixed to it a driving pulley 27designed for connection with any suitable source of power.

W'lth the above described arrangement of parts, rotation of the shaft 26by the pulley 27 likewise causes rotation of the sprocket or pulley 15and the sleeve 12 to which it is attached; the parts being so designedthat said sleeve turns at a hi her rate of speed, for example, fourtimes tTlEti) of the shaft 26.

The two sleeves 12 and- 14, both of; which extend within the casing ofthe machine are provided with outwardly extending radial armsrespectively carrying rims 28 and 29, which are flanged away from eachother, and are connected by longitudinally extending ribs All of theseribs are connected and supported intermediate the heads provided by thesleeves 12 and 14 and their arms, by hoops or rings 31 and each of themhas mounted upon it a longitudinally extending externally convex strip32 for the reception the bran is held by the corrugation until the brushremoves the bran from the ribs.

Upon the shaft 26 is a pair of oppositely facing, outwardly flangedcollars 34 and 35, so placed as to abut uponand close the inner ends ofthe two sleeves 12 and 14 and there is suitable packing, such as feltcloth, mounted between these collars and said sleeves to prevent theescape of material from the interiorv of the reel into them. Alsomounted bGlZWCGlLlZllQ shaft 26 within the reel and between the twocollars 34 and 35 is a pair of hubs carrying arms 36, to which arebolted or otherwise suitably attached a suitable number, in the presentinstance, three, of longitudinally extending bars 37 carrying brushbristles and them selves .constituting brushesextending prac- 1 ticallyfrom one end of the reel to the other. These: parts 3.? are so arrangedas to be inclined at a slight angle to the axialline of the reel so thatwhen rotated in the direction which is counterclockwise when viewed fromthe right-hand end of the machine, they cause the contents of the reelto be progressed from the left to the right-hand end thereof. Thediameter of the cylinder described by the brushes when these are rotatedwith the shaft 26 is slightly less than that of the cloth or screen ofthe reel but by means hereafterdescribed the shaft with the brushes isdisplaced to one side of and slightly above the axis of said reel, sothat said brushes are engaged by thecloth or screen or any part thereofunder operating conditions, p

vI also prefer to provide a plurality oflongitudinal radial blades whichare carried by the shaft and which extend substantially the entirelength .of the reel. These blades may be variously; formed and mounted,but I prefer and have shown blades 38 which are entirely independent ofthe brush bars 37, butwhich are mounted on the aforesaid arms 36 of theshaft 26. These blades are mounted between the brushes and extend forpractically the entire length of the reel and like the brushes, inclinedat an acute angle tothe line of the shaft 36. These blades, as-sho'wn inFig. 3, extend radially and move in a cylindrical path somewhat less indiameter than that of the brushes 27, being intended not only to insureflow or movement of material within the reel from the left'to theright-hand thereof, but also being intended to prevent said materialfrom compacting and cause its rotation at a high velocity so that itsheavier particles will tend to move outwardly together with the airunder the action of centrifugal force, thereby separating light foreignparticles.

Atthe left-hand end of the machine, there is an inlet opening 40provided in the end wall 9. through which material to'betreated isdelivered from a receiving hopper 41 so asto pass through the head 28into the interior of the reel.

At the opposite end of the machine, there are mounted on the'sleeve 14and on the head 29 a series of curved scoops 42 designed to collectmaterial from the adjacent endof the reel as the latter is rotated anddeliver it through said head 29 into a space 43, from whence it isdelivered from the machine through a discharge opening 44. Materialpassing through the cloth or screen of the reel is delivered by theinclined sides 6 into an elongated trough 45 extending longitudinally ofthe casing of the machine and from this is delivered from any suitableconveyor or receptacle.

The position of the shaft 26 with its brushes and conveying blades isadjustable within the reelby'reason of the fact it is carried in theboxes 25 which in turn are supported by adjustable set screws 46 passingradially through the octagonal bearing rings 23 and 24 as shown in Fig.I. Said screws are so positioned or set up that under conditions ofoperation the brushes 37 will engage and clean the inside surface of thecloth 33 of the reel along a longitudinal line thereof, preferably toone side of the middle of its top.

For cleaning the outside surface of the screen or clothof the reel, Iprovide a brush 50 mounted on a shaft 51 journaled; in the end members9and 10 of the casing and extending substantially parallel with theshaft 26 as shown in Fig. 3; there being preferably two oppositelyextending sets of bristles set in said brush. The shaft 51 extendsoutside of the casing and carriesa pulley 52 for the reception of a belt53fwhereby it is driven by power from a second pulley 54 on the shaft26. The pulleys 52 are preferably of the same diameter so that the shaft26 rotates at the same speed as the shaft 51 with its brush 50. Atthe'same time, the reel is preferably run at a speed approximatelyone-quarter that of the shaft 26 and its brushes, so that the latterwith the, brush 50 elfectually keep clean both the internal and externalsurface of the cloth or screen, maintaining it in a condition of maximumeffectiveness.

The material introduced into the hopper 41 enters the rotating reel,where it is re volved at a high rate of speed by reason of the action ofthe blades 38 and the brushes 3?. Under the action of centrifugal forceits heavier particles are separated from the lighter particles and, ifof the proper size, pass through the cloth or screen and fall into thetrough 45 of the machine. The branwith light flour dust is conveyed bythe brushes :and blades of the reel longitudinally thereof and isultimately picked up by the scoops 42 which discharge it from themachine through the space 43 and outlet 44 thereof.

It is to be noted that by reason of the adjustment of the brushes, thelatter do not interfere with the masses of material under treatment inthe lower part of the reel, since at this portion of the latter, saidbrushes clear its surface by a considerable distance. On the other hand,the cloth or screen of the reel is engaged by the rapidly rotatedbrushes both externally and 1nternally at portions which are relativelyinactive; i. e., the upper parts thereof, Where particles of adheringmaterial or particles which have lodged in the screen are effectuallydislodged so that the latter is kept at all times in condition ofgreatest effectiveness.

By the means above described the machine may be adjusted With the utmostnicety to operate in the most eflicient and satisfactory manner, so thatit will continuously act at full capacity to separate the flour andother valuable constituents of the grain from the bran, flour dust, andlight undesirable foreign particle ordinarily mixed With it.

I claim:

1. The combination in a bolting machine of a casing; a reelrotatably'mounted therein; a brush rotatably mounted within the reel andpositioned to operate on portions thereof adjacent its top; a secondbrush positioned to operate on the outer surface of the reel along aline directly opposite the line of engagement of the inner brush;

2. The combination in a bolting machine of a casing; a reel therein; twobrushes positioned to operate opposite one another respectively on theinner and outer surfaces of the reel; with means for rotating thebrushes and the reel.

3. The combination in a bolting machine of a casing; a reel therein; twobrushes posi- I tioned to operate opposite one another respectively onthe inner and outer surfaces of the reel; means for radially adjustingthe inner brush toward or from the inner surface of the reel; and meansfor rotating the brushes and the reel.

4. The combination in a bran duster of a casing; a reel having twosleeves rotatably mounted in the ends of the casing; a shaftpassing-through said sleeves; a brush on the shaft; means for adjustingthe shaft laterally to cause the brush to engage the upper portion ofthe reel; With collars on the shaft positioned to prevent escape ofmaterial through said sleeves.

5. The combination in a bolting machine,

of a casing; a reel therein having a series of longitudinally corrugatedribs for holding the bran; and a rotating brush carrier, having brushesarranged to engage the upper inner portion of the reel and to removematerial from the corrugated ribs, said brushes being clear of the lowerpor tion of the reel.

AUGUSTUS WOLF.

